Grout guide attachment

• US 7,232,280 B2
• Filed: 05/28/2003
• Issued: 06/19/2007
• Est. Priority Date: 05/28/2003
• Status: Active Grant

• Current Assignee: Credo Technology Corporation
• Original Assignee: Credo Technology Corporation
• Inventors: Bernardi, Walter, Landt, Michael
• Primary Examiner(s): Carter; Monica
• Assistant Examiner(s): Talbot; Michael W.
• Application Number:
  US10/446,945
• Publication Number:
  US 20040240956A1
• Time in Patent Office: 1,483 Days
• Field of Search: 409/137, 409/138, 409/175, 409/178, 409/182, 144/2.1, 144/3.1, 144/1.1, 144/48.5, 144/136.1, 144/136.95, 144/154.5, 144/252.1, 144/252.2, 451/449, 451/456, 831/00
• US Class Current: 409/137
• CPC Class Codes: B23Q 9/0028 the guide means being fixed only on the machine
• CPC Class Codes: B28D 1/183 Hand tools, e.g. portable, motor driven
• CPC Class Codes: Y10T 409/304088 with means to remove chip
• CPC Class Codes: Y10T 409/304144 Means to trim edge
• CPC Class Codes: Y10T 409/306496 with work follower
• CPC Class Codes: Y10T 409/306608 End mill [e.g., router, etc.]

Abstract

A guide attachment for a rotary hand tool is disclosed that comprises a housing, an adapter and a removable base. The attachment is configured to remove grout from between adjacent tiles, such as floor or wall tiles. The housing of the preferred embodiment is configured to permit a tool bit to engage a work surface at the normal intersection of two planes. The removable base of the preferred embodiment permits the attachment to work on flat surfaces. The base is also reversible and contains multiple sets of guide points for guiding the tool bit along grooves that have different widths. The preferred embodiment can also include a vacuum adapter that is attachable to the housing and allows a vacuum hose to be coupled to the guide attachment for removing debris during operation. The configuration of the housing or locking mechanism accommodates adapters having different circumferences.

Claims

1. A removable guide attachment for a rotary hand tool of the type which has an outer enclosure, a rotating collet rotating about an axis and a bit mounted in the collet for engaging a work surface, said attachment comprising:

a housing configured to allow the bit to engage a work surface at the intersection of two perpendicular planes wherein said housing includes an opening for receiving the rotary hand tool and a base portion located in a plane which is at an acute angle relative to the rotating axis, said housing having side portions which form a V shape for contacting and being guided by said two perpendicular intersecting planes, said side portions merging with said base portion, the bit extending below said base portion to engage the work surface;

an adapter configured for coupling to the rotary hand tool and wherein said opening is configured for receiving said adapter and said housing includes a locking mechanism for securing said adapter in a plurality of longitudinal positions relative to said housing;

said housing having a viewing opening for viewing the bit engaging the work surface and said adapter includes an opening aligned with said viewing opening.

2. A removable guide attachment according to claim 1 further comprising a removable vacuum adapter configured for coupling to a port and wherein said housing includes a port configured for receiving said vacuum adapter.

3. A removable guide attachment according to claim 1 further comprising a removable base configured for coupling to said housing wherein said removable base includes at least two guide points located 180 degrees apart for guiding the bit and said base portion along the work surface and wherein said housing is configured for receiving said removable base.

4. A removable guide attachment for a rotary hand tool of the type which has an outer enclosure, a rotating collet rotating about an axis and a bit mounted in the collet for engaging a work surface, said apparatus comprising:

a housing configured for receiving a removable base wherein said housing includes an opening for receiving the rotary hand tool and a base portion located in a plane which is at an acute angle relative to the rotating axis, said housing having side portions which define a V shape and merge with said base portion, said V shape enabling said housing to contact and be guided by surfaces of two perpendicular planes that intercept with one another, and wherein said base portion is located adjacent the intersection of two perpendicular planes and the bit extends below said base portion and engages the work surface; and

a removable base configured for coupling to said housing wherein said removable base includes at least two sets of two guide points wherein said two guide points of each set are located 180 degrees apart for guiding the bit and said base portion along the work surface.

5. A removable guide attachment according to claim 4 further comprising an adapter configured for coupling to the rotary hand tool and wherein said opening is configured for receiving said adapter and said housing includes a locking mechanism for securing said adapter in a plurality of longitudinal positions relative to said housing.

6. A removable guide attachment according to claim 4 wherein said housing includes a viewing opening for viewing the bit engaging the work surface.

7. A removable guide attachment according to claim 4 further comprising a vacuum adapter configured for coupling to a port and wherein said housing includes a port configured to receive said vacuum adapter.

8. A removable guide attachment according to claim 4 wherein said housing is configured to permit the bit to engage a work surface located at the intersection of two perpendicular planes.

9. A removable guide attachment according to claim 4 wherein said removable base is configured for coupling to said housing in more than one orientation.

10. A removable guide attachment according to claim 4 wherein said removable base includes at least one raised surface for ensuring a secure fit between said removable base and said housing.

11. A removable guide attachment according to claim 4 wherein said removable base includes at least two gripping surfaces located 180 degrees apart for aiding in the removal of said removable base.

12. A removable guide attachment for a rotary hand tool of the type which has an outer enclosure, a rotating collet rotating about an axis and a bit mounted in the collet for engaging a work surface, said apparatus comprising:

a housing configured for receiving a removable base wherein said housing includes an opening for receiving the rotary hand tool and a base portion located in a plane which is at an acute angle relative to the rotating axis;

a removable base configured for coupling to said housing wherein said removable base includes at least two sets of two guide points wherein said two guide points of each set are located 180 degrees apart for guiding the bit and said base portion along the work surface.

13. A removable guide attachment for a rotary hand tool of the type which has an outer enclosure, a rotating collet rotating about an axis and a bit mounted in the collet for engaging a work surface, said apparatus comprising:

an adapter configured for coupling to the rotary hand tool wherein said adapter includes at least one longitudinal flange for engaging a locking mechanism;

a housing having an opening configured for receiving said adapter, a base portion located in a plane which is at an acute angle relative to the rotating axis and a locking mechanism for securing said adapter in a plurality of longitudinal positions relative to said housing;

wherein said housing includes a viewing opening for viewing the bit engaging the work surface and said adapter includes an opening aligned with said viewing opening.

14. A removable guide attachment according to claim 13 further comprising a vacuum adapter configured for coupling to a port and wherein said housing includes a port configured for receiving said vacuum adapter.

15. A removable guide attachment according to claim 14 wherein said vacuum adapter includes an opening for allowing debris to flow to said port.

16. A removable guide attachment according to claim 13 further comprising a removable base configured for coupling to said housing wherein said removable base includes at least two guide points located 180 degrees apart for guiding the bit and said base portion along the work surface and wherein said housing is configured for receiving said removable base.

17. A removable guide attachment according to claim 13 wherein said housing is configured for allowing the bit to engage a work surface that results from the normal intersection of two planes.

18. A removable guide attachment according to claim 13 wherein said adapter is in the form of a generally hollow cylinder.

19. A removable guide attachment according to claim 13 wherein said at least one longitudinal flange includes an elongated opening for locking said adapter in a plurality of longitudinal positions relative to said housing.

20. A removable guide attachment according to claim 13 wherein said at least one longitudinal flange includes a depth indicator for specifying the depth of the bit on the work surface.

21. A removable guide attachment according to claim 13 wherein said adapter includes at least one longitudinal rib located around a circumference of an outer surface of said adapter for indicating the orientation of said adapter within said housing.

22. A removable guide attachment according to claim 21 wherein said housing includes an upper end portion for engaging said at least one longitudinal rib and preventing said adapter from being pulled outwardly from the housing.

23. A removable guide attachment according to claim 13 wherein said housing includes at least one housing flange for engaging said locking mechanism.

24. A removable guide attachment according to claim 23 wherein said locking mechanism comprises a threaded bolt with an enlarged knob biased toward said at least one housing flange and engaging a captive nut retained in said at least one housing flange, whereby said threaded bolt is configured for passing through said at least one longitudinal flange when rotated into engagement with said at least one housing flange.

25. A removable guide attachment according to claim 13 wherein said housing includes a longitudinal opening configured for receiving said longitudinal flange.

26. A removable guide attachment according to claim 13 wherein said adapter includes a plurality of internal threads.

27. A removable guide attachment according to claim 13 wherein said adapter includes a plurality of internal raised tabs.